Amendment to the Memorandum of Agreement Among the US General Services Administration, the Advisory Council on Hisotric Preservation, the District of Columbia Historic Preservation Office, the National Capital Planning Commission, and the United States Department of Homeland Security Regarding the Development of the Rehabilitation and Adaptive Reuse of Buildings 31, 33, 34, 37, 49, 71, and a portion of 56 at St. Elizabeths NHL (Phase 1b), Washington, D.C.